<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        .content{
            width: 1190px;
            margin: 0 auto;
            background-color: orange;
            height: 1000px;
        }
        .content .box{
            /* border: 4px solid red; */
            margin-right: -10px;
            overflow: hidden;
        }
        .item{
            width: 290px;
            background-color: skyblue;
            margin-right: 10px;
            margin-bottom: 10px;
            float: left;
        }
        .item.left{
            height: 370px;
        }
        .item.right{
            height: 180px;
        }
    </style>
</head>
<body>
    <div class="content">
        <div class="box">
            <div class="item left"></div>
            <div class="item left"></div>
            <div class="item right"></div>
            <div class="item right"></div>
            <div class="item right"></div>
            <div class="item right"></div>
            <div class="item right"></div>
            <div class="item right"></div>
            <div class="item right"></div>
            <div class="item right"></div>
            <div class="item right"></div>
            <div class="item right"></div>
            <div class="item right"></div>
        </div>
    </div>
</body>
</html>